This chip is part of communications gateway. I have 4 of them, so there might be several possible takes.
I don't know the feasibility of the project - what I would like to do is enable baud rate on three of the communication gateway devices (physically present, dip switches, but do not respond to toggle), and on the one that does have the baud rate enabled I need to enable an option that is already enabled on the other three.
There is a ten pin port that is connected the MCU, but if other pins access needed I can solder/connect to it. So there are no limits to how I have to connect to it, it depends on anyone's experience/ability on this forum. If there is no one who played with these MCUs, then it is a dead project for me!